All ISEE Middle Level Math Resources
Example Questions
Example Question #921 : Numbers And Operations
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number.
So, given the problem
of
we can re-write it as
Now, to multiply, we will write both numbers as fractions. So, to write as a fraction, we know percentages can be written as fractions over 100. So, we get
Now, to write as a fraction, we know whole numbers can be written as fractions over 1. So, we get
Now, before we multiply, we will simplify to make things easier. The zero in can cancel a zero in . So, we get
Now, the zero in can cancel the zero in . So, we get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #921 : Numbers And Operations
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number. So, in the problem
of
we can write
Now, we will write as a fraction. We know that percentages can be written as fractions over 100. So, we get
Now, we will write as a fraction. We know that whole numbers can be written as fractions over 1. So, we get
Now, before we multiply, we will simplify to make things easier. The zero in 10 can cancel a zero in 100. So, we get
The zero in 10 can cancel the zero in 90. So, we get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #251 : Percentage
Find of .
To find a percentage of a whole number, we will multiply the percentage by the whole number. So, in the problem
of
we can re-write it like this
Now, to multiply, we will first write as a fraction. We know that percentages can be written as fractions over 100. So, we can write
Now, we will write as a fraction. We know that whole numbers can be written as fractions over 1. So, we get
Now, we can simplify before we multiply to make things easier. The zeros in 100 can cancel the zeros in 200. So, we get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #251 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number.
So,
of
can be written as
Now, we will write as a fraction. We know that percentages can be written as fractions over 100. So, we get
Now, we will write as a fraction. We know that whole numbers can be written as fractions over 1. So, we get
Now, we will simplify before we multiply to make things easier. The zero in 70 can cancel a zero in 100. So, we get
Now, the zero in 10 can cancel the zero in 150. So, we get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #253 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number.
So, in the problem
of
we can re-write it as
Now, to multiply, we will write 25% as a fraction. We know percentages can be written as fractions over 100. So, we get
Now, we will write 300 as a fraction. We know whole numbers can be written as fractions over 1. So, we get
Now, before we multiply, we can simplify to make things easier. The zeros in 100 can cancel the zeros in 300. So, we get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #254 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number. So,
of
can be written as
Now, to multiply, we will write as a fraction. We know that percentages can be written as fractions over 100. So,
Now, we will write as a fraction. We know that whole numbers can be written as fractions over 1. So,
Now, before we multiply, we will simplify to make things easier. The zeros in 100 can cancel the zeros in 400. So,
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #251 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number.
So, given the problem
of
We can re-write it as
Now, we will write 80% as a fraction. We know that percentages can be written as fractions over 100. So, we get
Now, we will write 250 as a fraction. We know that whole numbers can be written as fractions over 1. So, we get
Now, we will simplify before we multiply to make things easier. The zero in 80 can cancel a zero in 100. So, we get
The zero in 10 can cancel the zero in 250. We get
Now, we can multiply straight across. We get
Therefore, of is .
Example Question #256 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number. We get
Therefore, of is .
Example Question #252 : Percentage
Find of .
To find a percentage of a whole number, we will multiply the percentage by the whole number. We get
The zeros can cancel. We get
Example Question #253 : Percentage
What is of ?
To find a percentage of a whole number, we will multiply the percentage by the whole number.
So, we get
The zeros can cancel out. We get
Therefore, of is .
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